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	<div id="pagetitle"><h1>YUI Library Examples: Slider Control: Horizontal Slider with two thumbs</h1></div>
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	<h1>Slider Control: Horizontal Slider with two thumbs</h1>
	
	<div class="exampleIntro">
	<p>This example demonstrates a simple horizontal dual-thumb Slider implementation.  Some characteristics to note include the following:</p>
<ul>
    <li>The thumbs are set on a slide bar with a 200 pixel range.</li>
    <li>A minimum distance is provided, preventing the thumbs from coming within 10 pixels of each other.</li>
    <li>Initial min and max values are supplied as 100 and 130 respectively.</li>
    <li>Clicking on the background will animate the nearest thumb.</li>
    <li>Min and Max value offsets are calculated from the <strong>center</strong> of the thumbs and must be accounted for conversion calculations.</li>
</ul>
			
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			<p class="newWindowButton yui-skin-sam"><!--<span id="newWindowLinkx"><span class="first-child">--><a href="slider_dual_thumb_clean.html" target="_blank">View example in new window.</a><!--</span></span>-->		
		</div>		<div id="example-canvas" class="bd">
	
		
	<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
	
	<div id="demo_bg" class="yui-h-slider" title="Range slider">
    <div id="demo_min_thumb" class="yui-slider-thumb"><img src="assets/left-thumb.png"></div>
    <div id="demo_max_thumb" class="yui-slider-thumb"><img src="assets/right-thumb.png"></div>
</div>

<p>Raw values: 
<label>Min: <input type="text" id="demo_from" size="3" maxlength="3" value=""></label>

<label>Max: <input type="text" id="demo_to" size="3" maxlength="3" value=""></label>

<button id="demo_btn">Update Slider</button>

<h3>Converted values:</h3>
<p id="demo_info"></p>

<script type="text/javascript">
(function () {
    YAHOO.namespace('example');

    var Dom = YAHOO.util.Dom;

    // Slider has a range of 200 pixels
    var range = 200;

    // No ticks for this example
    var tickSize = 0;

    // We'll set a minimum distance the thumbs can be from one another
    var minThumbDistance = 10;

    // Initial values for the thumbs
    var initValues = [100,130];

    // Conversion factor from 0-200 pixels to 100-1000
    // Note 20 pixels are subtracted from the range to account for the
    // thumb values calculated from their center point (10 pixels from
    // the center of the left thumb + 10 pixels from the center of the
    // right thumb)
    var cf = 900/(range - 20);

    // Set up a function to convert the min and max values into something useful
    var convert = function (val) {
        return Math.round(val * cf + 100);
    };

    // Slider set up is done when the DOM is ready
    YAHOO.util.Event.onDOMReady(function () {
        var demo_bg = Dom.get("demo_bg"),
            info    = Dom.get("demo_info"),
            from    = Dom.get("demo_from"),
            to      = Dom.get("demo_to");

        // Create the DualSlider
        var slider = YAHOO.widget.Slider.getHorizDualSlider(demo_bg,
            "demo_min_thumb", "demo_max_thumb",
            range, tickSize, initValues);

        slider.minRange = minThumbDistance;
        
        // Custom function to update the text fields, the converted value
        // report and the slider's title attribute
        var updateUI = function () {
            from.value = slider.minVal;
            to.value   = slider.maxVal;

            // Update the converted values and the slider's title.
            // Account for the thumb width offsetting the value range by
            // subtracting the thumb width from the max value.
            var min = convert(slider.minVal),
                max = convert(slider.maxVal - 20);

            info.innerHTML = "MIN: <strong>" + min + "</strong><br>" +
                             "MAX: <strong>" + max + "</strong>";
            demo_bg.title  = "Current range " + min + " - " + max;
        };

        // Subscribe to the dual thumb slider's change and ready events to
        // report the state.
        slider.subscribe('ready', updateUI);
        slider.subscribe('change', updateUI);

        // Wire up the button to update the slider
        YAHOO.util.Event.on('demo_btn','click',function () {
            // Get the int values from the inputs
            var min = Math.abs(parseInt(from.value,10)|0),
                max = Math.abs(parseInt(to.value,10)|0);

            if (min > max) {
                var hold = min;
                min = max;
                max = hold;
            }

            // Verify the values are in range
            min = Math.min(min,range - 30);
            max = Math.max(Math.min(max,range),min + 20 + minThumbDistance);

            // Set the new values on the slider
            slider.setValues(min,max);
        });
        // Attach the slider to the YAHOO.example namespace for public probing
        YAHOO.example.slider = slider;
    });
})();
</script>
	
	<!--END SOURCE CODE FOR EXAMPLE =============================== -->
	
		
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	</div>
		
	<h2 class="first">Building a dual thumb Slider</h2>
<p>You supply your own markup for the slider. Keep in mind the following points about markup for <a href="http://developer.yahoo.com/yui/slider/#dual">YUI Dual Thumb Slider Control</a> implementations:</p>
<ul>
    <li>The thumb elements should be children of the slider background.</li>
    <li>We use <code>&lt;img&gt;</code> elements rather than a CSS background for the thumbs to get around a performance bottleneck when animating thumb positions in IE.</li>
    <li>Don't apply a CSS border to the slider background.</li>
    <li>We use the Sam skin and thumb images <code>left-thumb.png</code> and <code>right-thumb.png</code>.</li>
</ul>

<p>Markup:</p>
<textarea name="code" class="HTML" cols="60" rows="1">
<div id="demo_bg" class="yui-h-slider" title="Range slider">
    <div id="demo_min_thumb" class="yui-slider-thumb"><img src="http://yui.yahooapis.com/2.8.1/build/slider/assets/left-thumb.png"></div>
    <div id="demo_max_thumb" class="yui-slider-thumb"><img src="http://yui.yahooapis.com/2.8.1/build/slider/assets/right-thumb.png"></div>
</div>

<p>Raw values: 
<label>Min: <input type="text" id="demo_from" size="3" maxlength="3" value="0"></label>

<label>Max: <input type="text" id="demo_to" size="3" maxlength="3" value="200"></label>

<button id="demo_btn">Update Slider</button>

<h3>Converted values:</h3>
<p id="demo_info"></p>
</textarea>

<p>Code:</p>
<textarea name="code" class="JScript" cols="60" rows="1">
(function () {
    YAHOO.namespace('example');

    var Dom = YAHOO.util.Dom;

    // Slider has a range of 200 pixels
    var range = 200;

    // No ticks for this example
    var tickSize = 0;

    // We'll set a minimum distance the thumbs can be from one another
    var minThumbDistance = 10;

    // Initial values for the thumbs
    var initValues = [100,130];

    // Conversion factor from 0-200 pixels to 100-1000
    // Note 20 pixels are subtracted from the range to account for the
    // thumb values calculated from their center point (10 pixels from
    // the center of the left thumb + 10 pixels from the center of the
    // right thumb)
    var cf = 900/(range - 20);

    // Set up a function to convert the min and max values into something useful
    var convert = function (val) {
        return Math.round(val * cf + 100);
    };

    // Slider set up is done when the DOM is ready
    YAHOO.util.Event.onDOMReady(function () {
        var demo_bg = Dom.get("demo_bg"),
            info    = Dom.get("demo_info"),
            from    = Dom.get("demo_from"),
            to      = Dom.get("demo_to");

        // Create the DualSlider
        var slider = YAHOO.widget.Slider.getHorizDualSlider(demo_bg,
            "demo_min_thumb", "demo_max_thumb",
            range, tickSize, initValues);

        slider.minRange = minThumbDistance;
        
        // Custom function to update the text fields, the converted value
        // report and the slider's title attribute
        var updateUI = function () {
            from.value = slider.minVal;
            to.value   = slider.maxVal;

            // Update the converted values and the slider's title.
            // Account for the thumb width offsetting the value range by
            // subtracting the thumb width from the max value.
            var min = convert(slider.minVal),
                max = convert(slider.maxVal - 20);

            info.innerHTML = "MIN: <strong>" + min + "</strong><br>" +
                             "MAX: <strong>" + max + "</strong>";
            demo_bg.title  = "Current range " + min + " - " + max;
        };

        // Subscribe to the dual thumb slider's change and ready events to
        // report the state.
        slider.subscribe('ready', updateUI);
        slider.subscribe('change', updateUI);

        // Wire up the button to update the slider
        YAHOO.util.Event.on('demo_btn','click',function () {
            // Get the int values from the inputs
            var min = Math.abs(parseInt(from.value,10)|0),
                max = Math.abs(parseInt(to.value,10)|0);

            if (min > max) {
                var hold = min;
                min = max;
                max = hold;
            }

            // Verify the values are in range
            min = Math.min(min,range - 30);
            max = Math.max(Math.min(max,range),min + 20 + minThumbDistance);

            // Set the new values on the slider
            slider.setValues(min,max);
        });
        // Attach the slider to the YAHOO.example namespace for public probing
        YAHOO.example.slider = slider;
    });
})();
</textarea>

<h2>Configuration for This Example</h2>

<p>You can load the necessary JavaScript and CSS for this example from Yahoo's servers.  <a href="http://developer.yahoo.com/yui/articles/hosting/?animation&slider&MIN#configure">Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured</a>.</p>

				</div>
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						<div id="loggerModule" class="yui-skin-sam">
						<h3 class="firstContent">YUI Logger Output:</h3>
								<div id="loggerGloss"><p><strong>Note:</strong> Logging and debugging is currently turned off for this example.</p> 
							<p class="loggerButton"><span id="loggerLink"><span class="first-child"><a href="slider_dual_thumb_log.html">Reload with logging<br />
	 and debugging enabled.</a></span></span></p></div>
	
						</div>
					
				
					<div id="examples">
						<h3>Slider Control Examples:</h3>
	
						<div id="exampleToc">
							<ul>
								<li><a href='../slider/slider-simple.html'>Basic Vertical Slider</a></li><li><a href='../slider/slider-ticks.html'>Horizontal Slider with Tick Marks</a></li><li><a href='../slider/slider-rgb.html'>RBG Slider Control</a></li><li><a href='../slider/slider_vert_swapped.html'>Bottom to top Vertical Slider</a></li><li class='selected'><a href='../slider/slider_dual_thumb.html'>Horizontal Slider with two thumbs</a></li><li><a href='../slider/slider_dual_with_highlight.html'>Dual-thumb Slider with range highlight</a></li><li><a href='../progressbar/pb_basic.html'>Basic Features (included with examples for ProgressBar Control)</a></li><li><a href='../progressbar/pb_events.html'>Events (included with examples for ProgressBar Control)</a></li><li><a href='../button/btn_example14.html'>Slider Button (included with examples for Button Control)</a></li><li><a href='../layout/adv_layout.html'>Complex Application (included with examples for Layout Manager)</a></li>							</ul>
						</div>
					</div>
					
					<div id="module">
						<h3>More Slider Control Resources:</h3>
						<ul>
							<li><a href="http://developer.yahoo.com/yui/slider/">User's Guide</a> (external)</li>
						<li><a href="../../docs/module_slider.html">API Documentation</a></li>
                            
                            
							<li><a href="http://yuiblog.com/assets/pdf/cheatsheets/slider.pdf">Cheat Sheet PDF</a> (external)</li></ul>
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